/Engine/Source/Runtime/CoreUObject/Public/Misc/PackageName.h
Get the mount point for a given package pathFNamecorresponding to the mount point, or Empty if invalid
static [FName](API\Runtime\Core\UObject\FName) GetPackageMountPoint ( const [FString](API\Runtime\Core\Containers\FString) & InPackagePath, bool InWithoutSlashes )